PC Gamer has word from the
Nerdist Podcast where Gearbox Software president Randy Pitchford mentions
they are "building an original IP for the next generation that we’ll announce
sometime later." He also dispels the notion that there will be no more DLC for
Borderlands 2 with the season pass fulfilled. Au contraire, says. Well,
he didn't say exactly that, he said this:

"Everyone has this expectation that those would be the four DLCs and then
that’s it," Pitchford said. "We’re going to do more. We’re going to do some
other things. We don’t have details yet about it exactly."

"We’ve got more stuff in the hopper that we’re planning and that we’re getting
pretty excited about. So if you are a Borderlands fan, you don’t have to be
afraid that that’s the end of it."

You can use the "what game doesn't" argument for almost every criticism of any game ever, it's kind of silly. I thought enemy variety was at least improved over Borderlands 1 but it still felt like there wasn't much effort to enemy abilities or boss AI. Personally I was more annoyed with the RPG mechanics being so threadbare to the point of wondering why they existed at all.

I think I would have enjoyed more of a straight up, faster paced shooter than the weird hybrid affair they offer isn't much of an RPG or a shooter. That's just my opinion though, I know Borderlands is a popular franchise so obviously a lot of people disagree with me and I'm quite willing to accept I'm in the minority, people don't need to get all mad or whatever

I think I would pick up BL3 if it was a bit deeper mechanically and had one large world with a bit more persistence and interactivity instead of small subzones. An 8-10 player game with some more quest variety and improved mechanics would make for a very interesting game. Maybe with the next gen consoles not hamstringing development they can get there!